Automatic locking device.



B. w. SMITH.

AUTOMATIC LOOKING DEV IGE. APPLICATION IILED APB..11, 1911.

Patented Sept. 3, 1912.

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/ WA W W 2 um/W604 V fizz/die 255M252 B. W. SMITH.

AUTOMATIC LOCKING DEVICE.

APPLIUATION FILED APB. 11, 1911. 1,037,803.

Patented Sept. 3, 1912.

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album CBI-UMIIA mum 60., VAIIIINGIDN. D- C-i BURDSEY W. SMITH, OF OROVILLE, CALIFORNIA.

AUTOMATIC LOCKING DEVICE.

Specification of Letters Patent.

Patented Sept. 3, 1912.

Application filed April 11, 1911. Serial No. 620,314.

To all whom it may concern;

Be it known that I, BURDsiiY W. SMITH, a citizen of the United States, residing at Oroville, in the county of Butte and State of California, have invented new and useful Improvements in Automatic Looking Devices, of which the following is a specification.

This invention relates to automatic looking devices for securing the doors of toilets in railroad cars.

It is customary to lock the doors of the toilets in railroad cars when trains approach cities and towns where stopsare to be made and to again unlock the doors after the trains have started subsequent to such stops.

The present invention has for its object to provide a simple and effective device whereby such locking and unlocking shall be automatically performed, thereby insuring certainty of operation and saving the time of the employees who have heretofore been required to perform such service A further object of the invention is to construct a simple and eflicient automatic locking device which, when automatically locked, may be manually unlocked by suitable means provided for the purpose.

With these and other ends in view which will readily appear as the nature of the invention is better understood, the same consists in the improved construction and novel arrangement and combination of parts v hich will be hereinafter fully described and.

particularly pointed out in the claims.

In the accompanying drawings has been illustrated a simple and preferred form of the invention, it being, however, understood that no limitation is necessarily made to the precise structural details therein exhibited, but that changes, alterations and modifications within the scope of the claims may be resorted to when desired.

In the drawings,-Figure 1 is a sectional elevation showing a portion of a railroad car and a door equipped wit-h the improved automatic locking device, showing also a section of a track equipped with a trip mechanism for actuating the locking device. Fig. 2 is a sectional detail view taken on the line 22 in Fig. 1. Fig. 3 is a sectional elevation, enlarged, of the locking device proper. Fig. 4 is a sectional detail view taken on the line H in Fig. 3. Fig. 5 is a sectional detail view taken on the line 55 in Fig. 3.

Fig. 6 is a detail view in elevation of the notched and toothed disk, showing also a portion of the push bar whereby the same is actuated and indicating also different positions of the bolt member.

Corresponding parts in the several figures are denoted by like characters of reference.

The improved locking device includes a bolt member 1 of elliptical shape which is mounted in a casing 2, the latter being secured upon some stationary part, such as the jamb 3 of a door frame. The door 4 carries a casing or keeper 5 adapted to engage the projecting end of the bolt member 1 which may be beveled, as shown at 6. The bolt member 1, as stated, is of oblong or elliptical shape, and it has a longitudinally extending slot 7 through which extends a pin or stud 8 whichis associated with the casing 2 and which constitutes a pivot about which the bolt member may turn. Springs 9 are arranged between the ends of the slots 7 and the pin 8, said springs serving to maintain the elliptical bolt member in position to permit said bolt member to be moved longitudinally, as will be readily understood. The bolt member is of such dimensions that one end thereof may project through the casing 2 to be engaged by the swinging door 4, as will be readily understood, while by imparting a quarter turn to the bolt member it will be moved to a non-engaging position with reference to the door, as indicated in dotted lines in Fig.3.

Associated with the elliptical bolt member 1 is a circular disk 10 having angular notches 11 formed at intervals of 90 degrees. Said disk may also be formed with ratchet teeth 12 engaged by a spring pawl 13 to prevent the rotation of said disk and of the bolt member in reverse direction. Suitably guided through the floor of the car is a push rod or'bar 14:, the upper end of which is adapted to engage the notches 11 in the disk 10 for the purpose of imparting to'the latter a one-quarter revolution by each upward movement of the push bar 14:. The movement in the latter in an upward direction is limited by a collar 15, and a suitably arranged spring 16 serves to normally retract said bush bar to keep the lower end thereof, which is provided with a cam 17 in the path of a lever 18 which is fulcrumed upon supporting members or braces 19 that extend downwardly from the floor of the f'approachingand leaving such lVhen the train approaches the station the 45 proj ected to. an obstruct-ingposition.

car. The: lower end of the lever 18 isadapt ed to be engaged by a trip member 20 which is suitably disposed in proximity to one of the track rails, said trip member being flush 5 with or extending slightly above the face of the rail. It will be seen that moving in one direction, the. lever 18 may be rockedby thev trip member without afiecting the position of the push bar, while moving in the opposite direction, the rocking of the lever will force the push bar in an upward direction to eiiect a one-quarter rotation of the disk associated with-the bolt member 1.

It will be evident from the foregoing de- 1& scription, taken in connection with the drawingshereto annexed, that-trip members-may be arranged alongside the-track-at suitable distances from a station to be engaged by the push barsconnected with the carsof a train station.

bolt'memberwill receive a quarterturn, bemg thereby mo-ved- 1ntoobstructing posltion witlr reference to the door; .upon leav- 253 mg. the station, the quarter turn will be sufii cient to move the bolt member to a nonobstructing pos tion.

The casing member 5 may be provided with alpivotedhandle member 21 operable 'from theinside and having associated therewitlran arm 22- adapted to engage the proj ectin-g end of I the bolt member: 11: when r the latter is in obstructing position for the purpose of pushingitback againstthe tension of the spring 9- to permit the door to-be opened. A suitable keymay also be pro-- vided toenable thedoorto be opened from the outside by those in authority to doso.

M Itwill be readily understood that itis 40 not=essentialto the-successful operation of this device that th'eb'olt membenl be oct perfect elliptical'shape provided that it is ot elongated form and that it isresiliently supported so that one end-thereof 'may be I will alsoibe-understood that the angular notchesqll maybe formed directly upon the bolt member, and that other minor structural changes may be made within the scope 5 0 of the invention.

Having thus described theinvention, what is claimed as new, is

1: Ina. lock, akeeper, and a bolt slidably mounted for movement into and outofen gagement with the keeper, saidbolt being also pivotally mounted for movement into andout ofengagement with the keeper independently of the sliding movement.

2. In a ,lockingdevice, a keeper, an elonggated bolt supported slidably With referenceto and for engagement with the keeper, and. pivotal supporting means whereby said bolt, is supported intermediate the ends thereof to permit said bolt to be moved into and out ofengagement with the keeper by a rotary movement about the pivotal axis t-ioned'substantiall'y at right angles to the direction of movement ofthe'bolt-to enable the latter to move intoand out-of engagement; with the keeper independently of the sliding movement of said bol t.

5. In a. locking device, a slid-ably supported elongated bolt .mem-benhaving a lon gitudinal slot pivotv member extending through the longitudinal slot and i supportingthe bolt member, springs interposed between the pivot-member and the ends of the slot, means for turning: the bolt member aboutthe pivot member-to the extentof'one quarter revolution at I suitable intervals, and

means for obstructing thie: reverse rotation of the boltmemberz 6. A casing mounted uponi a stationary support; apivot memberrin: said:casing, an

elongated bol t' member having a longitudinal slot engaging thepivot member, springs interposed between the: pivot member and the ends or the slot, angular I shouldersasses ciated with thebolt member: at intervals of 90 degrees, aspring retractedpushzbar engaging said shoulders, and meansfor projecting therp ush bar at predetermined in. 'tervals-to rotate the boltmember.

' In testimony whereof-I afli-xwmy. signature- -in presence ofitwo witnesses;-

BURDJS-EY W. SMITH; Witnesses:

Wt SMITH;

Gno. G. Timon.

Copi-es of. this patent may be obtained for five cents, each; by addressing-the Commissioner'01? Patents. Washington,v D; 0; 

